Digging Frozen Ground with a Ripper Bucket
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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To improve the digging capability of small excavators and backhoes in hard and frozen ground, a bucket of special design was selected from among a variety of attachments. This bucket cuts and rips the frozen ground, as lip teeth and a set of staggered teeth attached to the back of the bucket move through an arc during bucket rotation. Digging observations were made using a small mini-excavator and an Army tractor SEE with a rear-mounted backhoe. Frozen ground was excavated at several sites under impossible conditions for a conventional bucket. A large variation in excavation rates 3 to 30 cu. ydhr2. 3 to 23 cu. mhr was observed, depending on material type, frost thickness, sharpness of the cutters and operator experience.
- Soil Mechanics
- Construction Equipment, Materials and Supplies